Check out these clips from
"Pretty Little Liars" next episode, titled "The Mirror Has Three Faces" -- the show is definitely ramping things up headed toward the summer finale.

Above, Hanna and Caleb talk about the PO box left as the forwarding address for the apartment in New York City whose number was what Nigel was calling the night of the fire. Caleb has found an unpaid cable bill for an address in Philadelphia where Cece might be residing (if it was Cece at the NYC apartment, that is).

Below, Wren is back! He's interviewing Mona in Radley about what she claims to have done, namely killed Det. Wilden.

And finally, Hanna wants to sneak into Radley to talk to Mona about Cece, which Caleb says is not the best idea, dropping an excellent "Bell Jar" reference in the process. He also insists that Hanna tell some adults that "A" is back, saying that it can't get any worse than what is already happening.

"Pretty Little Liars" airs Tuesday nights at 8 p.m. ET/PT on ABC Family. Only three episodes left this summer!